Lucene 生成索引以及搜索的完整例子

转载自：http://www.oschina.net/code/snippet_12_543

package net.oschina.tester;

import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.RAMDirectory;

/**
 * 搜索测试
 * @author Winter Lau
 * @date 2010-10-18 下午09:20:18
 */
public class SearchTester {
 
 private static RAMDirectory dir;
 private static SimpleAnalyzer a;
 private static IndexSearcher searcher;
 
 /**
  * @param args
  */
 public static void main(String[] args) throws Exception {
  buildIndex();
  testSearch();
 }

 static void testSearch() throws Exception {
  Query q = new TermQuery(new Term("tags","TkRoot".toLowerCase()));
  TopDocs docs = searcher.search(q, null, 100000);
  System.out.println("HITS:"+docs.totalHits);
  for(int i = 0; i< docs.totalHits;i++){
   ScoreDoc s_doc = docs.scoreDocs[i];
   Document doc = searcher.doc(s_doc.doc);
   System.out.println(doc);
  }
 }
 
 static void buildIndex() throws Exception {
  dir = new RAMDirectory();
  a = new SimpleAnalyzer();
  IndexWriter writer = new IndexWriter(dir, a, IndexWriter.MaxFieldLength.UNLIMITED);
  Document doc = new Document();
  doc.add(new Field("id", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));
  doc.add(new Field("tags", "Java,数组,TkRoot", Field.Store.NO, Field.Index.ANALYZED));
  System.out.println(doc);
  writer.addDocument(doc);
  writer.close();
  searcher = new IndexSearcher(dir);
 }
}